What fields are the good anticorrosion properties of coloured steel sheets widely used in?

 

Coloured steel sheet has light weight, beautiful appearance, good anticorrosion performance, and can be directly processed. It provides a new raw material for construction, shipbuilding, vehicle manufacturing, furniture, electrical industry, etc. It has played a good role in replacing wood with steel, efficient construction, energy saving and pollution prevention.

 

In addition to zinc protection, the organic coating on the zinc layer acts as a covering and isolation function for the color steel plate with galvanized steel plate as its base plate, which can prevent the steel plate from rusting and has a longer service life than that of galvanized steel plate. It is reported that the service life of the coated steel plate is 50% longer than that of galvanized steel plate. However, the service life of color coated sheets with the same galvanizing amount, the same coating and the same coating thickness will vary greatly in different areas and different parts of use.

 

For example, in industrial areas or coastal areas, due to the effect of sulfur dioxide gas or salt in the air, the corrosion rate is accelerated and the service life is affected. During the rainy season, the coating will be corroded quickly and its service life will be reduced if it is wetted by rainwater for a long time or where the temperature difference between day and night is too large and condensable. Buildings or factories made of coloured steel plates often have longer service life when washed by rainwater. Otherwise, they will be affected by sulfur dioxide gas, salt and dust.

 

Therefore, in the design, the more inclined the roof is, the less easy it is to accumulate dirt and other dirt, and the longer the service life. For those areas or parts that are not washed by rainwater, regular water should be used to wash them.